package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        String openid = userLoginDTO.getCode();

        //如果获取失败，则抛出异常
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //如果获取成功，则判断用户是否为新用户
        User user = userMapper.getByOpenid(openid);
        //获取成功如果用户是新用户，则自动完成注册，然后封装为User对象
        if (user == null) {
            user = User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        //获取成功，如果用户是旧用户，则封装为User对象，返回
        return user;

        }
    //抽取到方法中（调用微信登录接口）
    private String getOpenid(String code) {
        //使用HttpClient调用微信接口，获取微信用户信息（openId）
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type", "authorization_code");

        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
